Flowserve BP - Manual (Page 29)

BP USER INSTRUCTIONS ENGLISH 85392725 10-09 (E)
Page 29 of 44 flowserve.com
e) Pull the rotor assembly completely out of the
casing barrel by using the lifting lug (Tool List
No.2) and crane or chain block.
f) Move the inner element (rotor assembly) to a
convenient location for dismantling and
inspection. Remove the lifting lug (Tool List
No.2) from the inner element.
g) Screw eye bolts (lifting bolts, Tool List No.10) in
the last stage diffuser [1413]. Then attach the
fixing device (Tool List No.15) to the inner
element (rotor assembly) using the hookers (Tool
List 8/9) and fix the lifting lug (Tool List No.3) on
the coupling side of shaft adjacent to fixing
device. Using the hookers (Tool List 8/9), put up
the inner element vertically by using eye bolts
(Tool List No.10), lifting lug (Tool List No.3) and
shaft lug (shaft lifting device, Tool List No.4).
Before fixing the lifting lug on the shaft, wrap
gum tape around the shaft, where the lifting lug is
fitted up, in order not to damage the shaft surface.
h) Put the inner element (rotor assembly) with the
shaft vertical and the last stage diffuser
uppermost on a proper supporting stand. In
supporting the inner element on the stand, make
use of the wide end surface of the suction stage
piece [1460] and support the coupling end of the
shaft separately near the upper limit of the shaft’s
clearance travel (axial movement of the shaft).
i) Remove all the special dismantling tools attached
to the rotor assembly.
6.7.5 Balancing drum removal
Loose fit balancing drum
a) Remove the spirolox ring [6544], unscrew the
bolts [6570], and take off the retainer thrust ring.
After this work, push the balancing drum [6230]
toward the last stage impeller. Then, remove the
split-type thrust ring [2531.3], backup ring [3645]
and “O” ring [4610]. Take off the balancing drum
[6230] from the shaft by pulling it with the eye
bolts supplied as special tools (Tool List No.20).
Shrink fit balancing drum
a) Apply heat on balancing drum. Push the
balancing drum [6230] toward the last stage
impeller. Then, remove the split-type thrust ring
[2531.3]. Take off the balancing drum [6230] from
the shaft by pulling it with the eye bolts supplied
as special tools (Tool List No.20).
b) Remove the socket head cap screws of the last
stage diffuser [1413]. Pull out the last stage
diffuser [1413] by eye bolts (Tool List No.10)
6.7.6 Diffuser and impeller removal
In dismantling each diffuser, make a mark
on each diffuser removed so as to insure proper
reassembly.
a) Remove spirolox ring [6544], the last stage
impeller [2200.11], the split ring [2531] and
impeller key [6700].
b) For shrink fit impellers without spirolox ring, heat
on impeller hub by using a torch until it is free,
and then quickly lift the impeller.
c) Thread two eye-bolts (Tool List No.11) in the
preceding stage piece [1460] and attach a sling
long enough to clear the shaft. Heats the
periphery of the preceding stage piece [1460] by
using a torch until it is free, and then quickly lift
the stage piece.
d) Fix the lifting jig (Tool List No.13) with bolts or
eye bolt (Tool List No.12) on the diffuser [1411],
and then lift the diffuser.
e) Remove spirolox ring [6544], impeller [2200], split
ring [2531]and impeller key [6700] of the
preceding stage.
f) Dismantle remaining stages in the same manner
as described before. Eye-bolts (Tool List No.11)
should be used for lifting the stage pieces and
lifting jig (Tool List No.13) or eye bolt (Tool List
No.12)
should be used for lifting diffusers.
g) Remove 1st stage impeller [2200].
h) Remove 1st stage impeller [2200].
i) Install the shaft lug (Tool List No.4) on the shaft
at the location of the thrust bearing and fix it with
the thrust collar nut [3712.1]. Lift the shaft until it
is above the support stand and put it horizontally
on a wooden block.
6.8 Examination of parts
Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly. In particular, fault diagnosis is essential to
enhance pump and plant reliability.
6.8.1 Casing
Inspect the waterways in the impellers and diffusers
to see whether any erosion has taken place.
Carefully examine the important metal to metal joints
between the parts described below. If parts need to
be repaired contact Flowserve.
a) The stage piece [1460] and the casing barrel
[1100]
b) Adjacent diffusers [1411, 1412, 1413].
c) Discharge head [1221] to casing barrel [1100].
d) Stuffing box [4112] to discharge head [1221].
e) Suction head [1222] to casing barrel [1100].